{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["country of capital", "ethnicity of people"], "input": "To the Editor : Re '' Bloodied Marines Sound Off About Want of Armor and Men '' -LRB- front page , April 25 -RRB- : Your front-page photograph of the Humvee outfitted with cobbled-together armor in which four marines died last May in Ramadi , Iraq , brought on a rush of tears and a sadness that I had not felt for some time ."}
{"country of capital": [], "ethnicity of people": []}